Abstract
The WC and high chromium cast iron (HCCI) welded layers were prepared on Q235 low carbon steel by hardfacing technique in order to improve high-temperature performance. The microstructure and mechanical properties of the welded layer were investigated. It was found that Fe3W3C is the major strengthening phase of the WC welded layer. Furthermore, a high-temperature three-body abrasive wear experiment was designed and conducted on the welded layers. The results show that the wear resistance of the WC welded layer was much better than that of the HCCI welded layer at both room and high temperatures. During the high-temperature abrasive wear process, the Fe3W3C phase can effectively strengthen the matrix and hence, contribute to improved wear resistance.
Highlights
Q235 low carbon steel has been widely used as structural material due to its good plasticity and welding performance
The microstructure, hardness, and abrasive wear properties of the WC and high chromium cast iron (HCCI) welded layers were investigated in this work
We find that the WC welded layer contains a minor WC phase
Summary
Q235 low carbon steel has been widely used as structural material due to its good plasticity and welding performance. Surface hardening and coating techniques have been applied to improve the wear resistance of Q235 steel [1–3]. A high-manganese steel surfacing electrode was used to obtain a fully austenitic layer with high work-hardening rate, high toughness, and good wear resistance [6]. Ceramic particles, such as WC, TiC, and SiC, were introduced to the surfacing electrodes [2,4,7–9]. The hardness of the welded layers was measured at room and high temperatures. A three-body abrasive wear resistance test setup was designed to evaluate the wear properties of the welded layer at high temperatures and room temperature
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